package com.lagou.web.servlet;

import com.lagou.base.Constants;
import com.lagou.pojo.Course;
import com.lagou.service.CourseService;
import com.lagou.service.impl.CourseServiceImpl;
import com.lagou.utils.DateUtils;
import com.lagou.utils.UUIDUtils;
import org.apache.commons.beanutils.BeanUtils;
import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.FileUploadException;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
import org.apache.commons.io.IOUtils;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

@WebServlet("/courseSalesInfo")
public class CourseSalesInfoServlet extends HttpServlet {

    /**
     * 保存课程营销信息
     * @param req
     * @param resp
     * @throws ServletException
     * @throws IOException
     */
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {

        try {
            //创建Course对象
            Course course = new Course();

            //创建Map集合用来收集数据
            Map<String,Object> map = new HashMap<>();

            //创建磁盘工厂对象
            DiskFileItemFactory factory = new DiskFileItemFactory();

            //文件上传核心对象
            ServletFileUpload fileUpload = new ServletFileUpload(factory); List<FileItem> list = fileUpload.parseRequest(req);

            //解析request对象，获取表单项集合


            //遍历集合
            for(FileItem item:list){
                boolean formField = item.isFormField();
                if(formField){
                    //普通表单项
                    String fieldName = item.getFieldName();
                    String fieldValue = item.getString("UTF-8");
                    System.out.println(fieldName + " " + fieldValue);
                    //放入map
                    map.put(fieldName,fieldValue);
                }else{
                    //文件上传项
                    //获取文件名
                    String name = item.getName();
                    String newFileName = UUIDUtils.getUUID() + "_" +name;
                    //获取输入流
                    InputStream in = item.getInputStream();
                    //得到路径信息
                    String realPath = this.getServletContext().getRealPath("/");
                    //修改保存路径
                    String webappsPath = realPath.substring(0, realPath.indexOf("lagou_edu_home"));
                    //创建输出流
                    OutputStream out = new FileOutputStream(webappsPath + "/upload/" + newFileName);

                    //拷贝文件
                    IOUtils.copy(in,out);
                    out.close();
                    in.close();

                    //保存图片路径
                    map.put("course_img_url", Constants.LOCAL_URL+"/upload/" + newFileName);

                }
            }

            //使用BeanUtils 将map中的数据封装到course对象
            BeanUtils.populate(course,map);
            //得到操作的时间
            String dateFormart = DateUtils.getDateFormart();

            CourseService cs = new CourseServiceImpl();

            if(map.get("id") != null){
                //修改操作
                //补全信息
                course.setUpdate_time(dateFormart);
                //业务处理
                String result = cs.updateCourseSalesInfo(course);
                //响应结果
                resp.getWriter().print(result);
            }else {
                //新建操作
                //补全信息
                course.setCreate_time(dateFormart);
                course.setUpdate_time(dateFormart);
                course.setStatus(1);
                //业务处理
                String result = cs.saveCourseSalesInfo(course);
                //响应结果
                resp.getWriter().print(result);
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        doGet(req,resp);
    }
}
